chore(deps-dev): bump langchain-openai

Bumps the langchain group with 1 update in the / directory: [langchain-openai](https://github.com/langchain-ai/langchain).


Updates `langchain-openai` from 0.2.14 to 0.3.29
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-openai==0.2.14...langchain-openai==0.3.29)

---
updated-dependencies:
- dependency-name: langchain-openai
  dependency-version: 0.3.29
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: langchain
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]